煤矸石淋滤释放特性的实验研究

aking the coal-waste rock from a digging as research object, this research studied the change of extra parameters such as pH、Eh、S2-、TP、NO3-N、F- and heavy metals in the process of leaching. The research indicated that the dissolution of elements from every swatch achieved equilibrium after 8 days. At the beginning of leaching, the concentration of the contaminations was higher; subsequently it began to reduce gradually and at last it went to retain stabilization, so this research deduced that the environment effect of contamination in coal gangue mainly happened at the initial stages of leaching; the leachable contents of the hazardous elements from coal gangue were closely related to the pH of the leaching liquor and the background value of the contamination; according to the environment quality standard of surface water, the max leachable content of the hazardous element every sample accorded with the third standard values.